获取此错误名称空间声明语句必须是脚本中的第一个语句

Question

得到此错误:

命名空间声明语句必须是脚本中的第一个语句

在这段代码的开头:

namespace app\controllers;
use yii\web\Controller;
use app\models\users;

class UserController extends Controller
{
     public function actionIndex()
     {
         echo "working on .....";
     }
}

Answer 1

你可能有这个错误,因为你之后有一个空格 <?php

 <?php
namespace app\controllers;
use yii\web\Controller;
use app\models\users;

class UserController extends Controller
{
     public function actionIndex()
     {
         echo "working on .....";
     }
}

只需删除它

<?php
namespace app\controllers;
use yii\web\Controller;
use app\models\users;

class UserController extends Controller
{
     public function actionIndex()
     {
         echo "working on .....";
     }
}